Water heating apparatus



Feb. 7, 1933. R. D. HEAPS WATER HEATING APPARATUS Filed July 50, 1930III.

Patented Feb. 7, 19 33;

PATENT OFFICE BOSS D. HEAPS, OF LOCKPORT, ILLINOIS WATER HEATINGAPPARATUS Application filed July 30,

My'invention relates to water heating apparatus and it has for itsobject the provision of a new and improved form and arrangement ofpartsby which a supply of water may be heated through the medium of thehot gases escaping through the flue from a boiler or furnace. To thisend, it is one of the objects of my invention to provide an improvedarrangement comprising a casing or housing through which the hot gasesescape from the furnace, with a double coil arrangement therein fordirect heating of the water passing through one of the coil parts andindirect heating of the water passing through the other coil part.

the center ,of the housing of my improved apparatus; and 1 Fig. 3 isanenlarged detail View, being taken substantially at line 33 of Fig. 1.

Referring to the several figures of the drawing, in which correspondingparts are indicated by the same reference characters, 10 indicates aboiler, being shown as the boiler of a hot water or steam heating plant,the hot water pipe being indicated by the nu- 0 meral 11 and the returnpipe by the numeral 12. A casing 'orhousing 13 is shown interposedbetween'portions of the metal pipe 14 by which the smoke and hot gasesare conducted away from the furnace 10.

As is best shown in Fig. 2, the housing 13 is provided with oppositelyextending pipe sections; 15 and '16 at opposite sides thereof forreception of the-pipe sections 14., the arrangement being such that thepipe sections 14 of standard size fit snugly within the pipe 1930.Serial No. 471,701.

sections 15 and 16. Additional oppositely extending pipe sections 17 and18 are also provided for use alternatively in place of either one orboth of the pipe sections 15 and 16. By this arrangement the utmost easeis provided in the matter of installation-of the water heatingapparatus. Closure caps 19 of any approved type are provided for closingsuch two of the pipe sections 15, 16, 17 and 18 as are not used in theinstallation." Inasmuch as the caps 19 are readily removable at anytime, ready access to the interior of the casing for cleaning the partstherein is provided.

l/Vithin the housing 13, I have provided a double coil arrangementcomprising a coil 20 supported in the housing upon a shoulder 21, and asecond coil part 22 located within the coil 20. At opposite ends of thecoils 20 and 22, fittings 23 are provided for connecting the ends of thecoil 20 in communication with other pipes, the ends of the coil 22'being extended through the walls of the fittings as is clearly shown inFig. 3. The fittings 23 and the ends of the coil 20 6X tend through aflanged plate which closes the face of the housing 13. By the engagementof the fittings 23 with the plate 24, the coils are held in positionupon the shoulder 21 with the required firmness. 7

As is shown in Fig. 1, one of the fittings 23 is connected by means of aline of piping 25 with the upper end of the water jacket portion of thefurnace 10, while the other fitting 23 is connected by means of a lineof piping 26 with the lower end of the water jacket portion of saidfurnace. The upper end of the coil 22 is-connected by means of a line ofpiping 26a with a storage tank 27 at the upper portion of the tank, andthe low- 7 er end of the coil 22 is connected by a line of piping 28with the lower part of said storage tank 27. In the arrangement shown acold water pipe 29 is .connectedwith the tank 27. Pipes 30 and 31 areconnected with the tank 27 for supplying water therefrom for domesticpurposes, it being understood that water is delivered'through the pipe29 under pressure for efiecting the delivery of water through the supplypipe 30.

Asis shown in the drawing, the ends of the pipe 22 have brazedconnections to the fittings 23, but tight joints might be provided inany other suitable manner. As will be readily appreciated, the doublecoil device may be easily removed as a unit with the plate 24 wheneverdesired.

In the embodiment of my invention as shown, with a fire provided withinthe firebox of the boiler 10 in the usual manner, hot water risesthroughthe pipe 11 to a series of radiators, the water returning to the boilerfor reheating through the pipe 12. At the same time, the hot gasespassing outwardly and upwardly through the smoke stack 14 heats thewater within the coil 20 causing a circulation of water upwardly throughthe coil and through-the pipe 25 to the supply of water in the'boiler10, a supply of comparatively colder water passing upwardly. to the coilthrough the pipe 26. At the same time, water fed to the coil 22 throughthe pipe 28 from the tank 27 is heated within the coil 22 through theefi'ect of the hot water passing through the coil 20. Such water withinthe coil 22 rises through the pipe 26a to the storage tank 27, servingto keep the water within the tank 27 at the desired high temperaturewithout danger of the temperature rising too high therein.

Inasmuch as the water flowing through the boiler 10 and through theheating system comprising the pipes 11 and 12, and through the coil part20 connected to the boiler by the pipes 25 and 26 is kept in constantcirculation for the heating effect without any considerable consumptionor waste of such water, it will be understood that regardless of thedegree of hardness of such water there is a very slight deposit of limeor similar materials within any part of the system. By reason of thefact that the water passing through the coil 22 and the pipes 26a and 28to the storage tank 27 is subject to indirect heating only, it will beappreciated that there will be practically no deposit of lime or otherlike material within the coil 22 or any otherportion of the system.

The arrangement is such that when there.

the main supply of water being heated by the boiler 10 is heated in partby the eliect of the hot gases which would otherwise be lost. At thesame time, the auxiliary supply of water for domestic uses is heatedentirely by such hot gases.

WVhile I prefer to employ the arrangement as shown in my drawing, whenmy invention is being employed for the purpose of supplying water fordomestic uses in connection with a hot water heating system, it will beunderstood that the invention is not to be limited to the arrangement asshown, except so far as the claims may be so limited by the prior art,it being understood that changes would be made in the arrangement tomeet varying conditions in any case where the hot water supply were tobe used otherwise than as above indicated in connection with theembodiment illustrated.

I claim 1. In an apparatus of the type described, the combination of aboiler, a storage tank "for hot water, a double coil arrangementcomprising two coil parts one inside of the other, means for connectingthe outs1de coil part into a circuit with said boiler, other means forconnecting'the inside coil part into acircuit with said storage tank,and means for applying heat exteriorly to said coils whereby the boilerwater supply has heat applied directly thereto and the Storage tankwater supply is heated indirectly from the hot water in said outsidecoil.

2. In an apparatus of the type described, the combination of a boiler, ahousing connected in the smoke flue of said boiler, a

double coil arrangement in said housing comprising two coil parts oneinside of the other, means for closing the ends of said outside coilpart about the inside coil part and for connecting said outside coilwith the water chamber of said boiler,a tank, and means for connectingsaid inside coilwith said tank for delivering hot water to the tank fromsaid inside coil independently of said outs1de COll part.

3. In an apparatus of the type described;

ing tightly through openings in the walls of the fittings, connectionsthrough said fittings between said outside coil part and the waterchamber of said boiler, and connec tions with said inside coil part fordelivery of hot water therefrom independently of said outside coil part.

, 4. In an apparatus of the type described, the combination of a boiler,a housing connected in the smoke flue of said boiler, a double coilarrangement in said housing comprising two coils parts one inside of theother, fittings on the ends of, the outside coil part with the ends ofthe inside coilpart extending tightly through openings in the walls ofthe fittings, connections through the medium of said fittings betweensaid outside coil part and the water chamber of said boiler, a storagetank, and connections betweensaid inside coil part and said storage tankfor delivering hot water to said tank from said coil.

5. In a water heater for use in connection with a boiler and a domesticwater storage tank, the combination of a casing, meansfor connectingsaid casing in the flueof the boiler for the passage of the heated gasesfrom the boiler therethrough, water heating means within said casingcomprising a double tube arrangement in the form of a tube within atube, means for connecting the outside tube of said double tube means ina circuit with said boiler, and means for connecting the inside tube ofsaid double tube means in a circuit with said storage tank.

6. In a Water heater for use in connection with a'boiler and a domesticwater storage tank, the combination of a casing, means for connectingsaid casing in the flue of the boiler for the passage of the heatedgases from the boiler therethrough, water heating means within saidcasing comprising a tube within a tube extending substantially acrosssaid casing a plurality of times for efiective contact with the hotgases therein, means for connecting the outside tube means in a circuitwith said boiler, and means for connecting the inside tube'means in acircuit with the storage tank.

7. In a water heater for use in connection with a boiler and a domesticwater storage tank, the combination of a casing, means for connectingsaid casing in the flue of the boiler for the passage of the heatedgases from the boiler therethrough, water heating means within saidcasing comprising a double coil arrangement in the form of a tube withina tube, means for connecting the outside tube in a circuit with saidboiler, and means for connecting the inside tube in a circuit with saidstorage tank.

ROSS D. HEAPS.

